Blar i NTNU Open på forfatter "Johansen, Tor Arne"
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Applications of High-Precision Optical Imaging Systems for Small Unmanned Aerial Systems in Maritime Environments
Rodin, Christopher Dahlin (Doctoral theses at NTNU;2019:328, Doctoral thesis, 2019)Enabling technologies such as more powerful and miniaturized embedded computers, sensors, and power systems have rendered small Unmanned Aerial Systems (sUAS) cheap and readily available for industry, consumers and university ... -
Approach Methods for Autonomous Precision Aerial Drop from a Small Unmanned Aerial Vehicle
Mathisen, Siri Holthe; Grindheim, Vegard; Johansen, Tor Arne (Journal article; Peer reviewed, 2017)One of the many basic operations that a fixed-wing unmanned aerial vehicle (UAV) should master autonomously is to deliver an object to a precise position. Among several possible delivery approaches, this paper chooses to ... -
Approaches to Economic Energy Management in Diesel-Electric Marine Vessels
Skjong, Espen; Johansen, Tor Arne; Molinas Cabrera, Maria Marta; Sørensen, Asgeir Johan (Journal article; Peer reviewed, 2017)Recently, the efficiency of diesel-electric marine vessels has been subject for discussion with focus on improving fuel efficiency, reducing the environmental footprint from emissions, as well as reducing running hours and ... -
Asymptotic stability of perturbation-based extremum-seeking control for nonlinear plants
Haring, Mark; Johansen, Tor Arne (Journal article; Peer reviewed, 2016)Abstract—We introduce a perturbation-based extremum-seeking controller for general nonlinear dynamical plants withan arbitrary number of tunable plant parameters. The controllerensures asymptotic convergence of the ... -
Atmospheric Correction for HYPSO-1 Data
Vigre, Edmond Baloku (Master thesis, 2023)Denne masteroppgaven undersøker bruken av ACOLITE for atmosfærisk korreksjon på HYPSO-1 data, sammenligner den med to andre korreksjonsmetoder (6S og ELF), og analyserer forskjellene til en ny versjon av HYPSO-1 kalibreringen. ... -
Atmospheric Ice Accretions, Aerodynamic Icing Penalties, and Ice Protection Systems on Unmanned Aerial Vehicles
Hann, Richard (Doctoral theses at NTNU;2020:200, Doctoral thesis, 2020)This thesis focused on atmospheric ice accretions, aerodynamic icing penalties, and ice protection systems (IPS) on fixed-wing unmanned aerial vehicles (UAVs). The motivation for this work was to increase the knowledge ... -
Attitude Estimation by Multiplicative eXogenous Kalman Filter
Stovner, Bård Nagy; Johansen, Tor Arne; Fossen, Thor I.; Schjølberg, Ingrid (Journal article, 2018)This paper presents a novel attitude estimator called the multiplicative exogenous Kalman filter. The estimator inherits the stability properties of a nonlinear observer and the near-optimal steady-state performance of the ... -
Automated docking for underactuated surface vessels: A docking-adapter assisted approach
Horntvedt, Jonas Anker (Master thesis, 2023)Når man designer autonome fartøy for dokk-til-dokk-operasjoner, er det avgjørende å automatisere alle aspekter av reisen. Dokk-til-dokk-operasjonen består typisk av tre faser: frakobling, transport og dokking. Frakobling ... -
Automatic detection, classification and tracking of objects in the ocean surface from UAVs using a thermal camera
Leira, Frederik Stendahl; Johansen, Tor Arne; Fossen, Thor I. (Journal article; Peer reviewed, 2015)The use of unmanned aerial vehicles (UAVs) that can operate autonomously in dynamic and dangerous operational environments are becoming increasingly common. In such operations, object detection, classification and tracking ... -
Automatic Dock-to-Dock Control System for Surface Vessels using Bumpless Transfer
Walmsness, Jens Emil; Helgesen, Håkon Hagen; Larsen, Stefan; Kufoalor, D. Kwame Minde; Johansen, Tor Arne (Peer reviewed; Journal article, 2023)This paper proposes and demonstrates an automatic steering system designed for passenger ferries with dock-to-dock capabilities. The method consists of a modular control architecture and bumpless transfer transition ... -
Automatic landing of multi-rotor on a floating maritime platform
Linga, Odin (Master thesis, 2020)OASYS prosjektet forsøker å bruke Miniatyr Undervanns Glidere (MUGs) for å overvåke miljøet under havet, og bruke multirotor UAV-er til å plukke opp MUG-ene og frakte dem til autonome overflatefartøy hvor de kan lade. Målet ... -
Automatic Landning of Multi-Rotor on Moving Platform
Krivokapic, Vuk (Master thesis, 2019)Bruk av ubemannede luftfartøyer (UAV) i autonome offshore-oppdrag har økt drastisk de siste årene. UAVene har gjort det mulig å utføre oppdrag i tøffe værforhold uten å risikere menneskeskader. Hoveddelene av et UAV oppdrag ... -
Automatic steering system with dock-to-dock capability for passenger ferries
Walmsness, Jens Emil (Master thesis, 2022)Abstract will be available on 2025-06-06 -
Autonomous Aerial Recovery: Fixed-wing UAV Ballistic Airdrop and Deep-Stall Landing
Mathisen, Siri Gulaker (Doctoral theses at NTNU;2020:61, Doctoral thesis, 2020)Although human beings don’t have wings, it is often very useful to fly. Or at least to use the air to transport objects. Sometimes these objects have to be delivered on normally unreachable places under difficult conditions, ... -
Autonomous ballistic airdrop of objects from a small fixed-wing unmanned aerial vehicle
Mathisen, Siri Gulaker; Leira, Frederik Stendahl; Helgesen, Håkon Hagen; Gryte, Kristoffer; Johansen, Tor Arne (Peer reviewed; Journal article, 2020)Autonomous airdrop is a useful basic operation for a fixed-wing unmanned aerial system. Being able to deliver an object to a known target position extends operational range without risking human lives, but is still limited ... -
Autonomous COLREGs-Compliant Decision Making using Maritime Radar Tracking and Model Predictive Control
Kufoalor, D. Kwame Minde; Wilthil, Erik Falmår; Hagen, Inger Berge; Brekke, Edmund Førland; Johansen, Tor Arne (Chapter, 2019)This paper addresses the challenges of making safe and predictable collision avoidance decisions considering uncertainties related to maritime radar tracking. When a maritime radar is used for autonomous collision avoidance, ... -
Autonomous contact-based thickness measurement from a multirotor UAV
Sortland, Sondre (Master thesis, 2019)Denne avhandlingen undersøker automatiseringen av tykkelsesmålinger ved hjelp av en ultralydssonde montert på en drone. Bruk av ubemannede luftfartøyer (unmanned aerial vehicles (UAVs)) for ikke-destruktiv testing ... -
Autonomous Flow-Through RGB and Hyperspectral Imaging for Unmanned Surface Vehicles
Haugum, Matias; Fragoso, Glaucia; Henriksen, Marie Bøe; Zolich, Artur; Johansen, Tor Arne (Journal article, 2023)The process of collecting samples for traditional microscopic analyses can be costly and time-consuming. We present the design of an autonomous flow-through imaging (AFTI) system tailored for small unmanned surface vehicles ... -
Autonomous Icing Protection Solution for Small Unmanned Aircraft: An Icing Detection, Anti-Icing and De-Icing Solution
Sørensen, Kim Lynge (Doctoral thesis at NTNU;2016:275, Doctoral thesis, 2016)This monograph is motivated by the lack of an autonomous icing protection solution for small unmanned aerial vehicles. The atmospheric phenomenon commonly referred to as aircraft icing is one the most dangerous weather ... -
Autonomous Inspection of Wind Turbines and Buildings using an UAV
Høglund, Sondre (Master thesis, 2014)This thesis describes the use of optical flow and Hough transform in local navigation,particularly the case of inspecting wind turbines and buildings for damages. The goal isto create an observer capable of estimating the ...